X-ray picture of
the Sun

Solar Images from the Yohkoh Satellite

These images come from the Yohkoh satellite, a solar observatory orbiting the Earth from 1991 to 2001.

Yohkoh detected the X-rays produced by the Sun's hot outer atmosphere. During most of 1992, Yohkoh also made visible (or "white light") images of the Sun. The images listed below are in the GIF format. They are about 262 kilobytes each; image resolution is 512 pixels by 512 pixels.

The white-light images are stamped with the date and time of the observation; the date stamps have been left off of the X-ray images. Use what you have learned about magnetic active regions to match the X-ray pictures with the respective simultaneous white-light images. (This activity may be more manageable if you print out all the images on individual pages, and then try to match them up. Alternatively, you can save some paper by printing out just the X-ray pictures and comparing them to the white-light images on screen.) The images have been further divided into two sets: Novice and Challenge.

All of the images below will print out nicely on a black and white printer. Enjoy!

Medium Version -- Novice Set
White Light
(with Date Stamp)

1992 January 23
1992 February 07
1992 February 22
1992 March 08
1992 April 07
1992 June 06
1992 July 06
1992 July 21
1992 September 04
1992 October 05
X-rays
(no Date Stamp)

A
D
G
H
L
N
O
Q
S
U



Medium Version -- Challenge Set
White Light
(with Date Stamp)

1992 March 23
1992 April 22
1992 May 07
1992 May 22
1992 June 21
1992 August 05
1992 August 20
1992 September 19
1992 October 19
1992 November 03
X-rays
(no Date Stamp)

B
C
E
F
I
J
K
M
P
R



The key for this MEDIUM puzzle is located at:
http://solar.physics.montana.edu/YPOP/Classroom/Lessons/Cycles/medikey.html

To choose more images, or more kinds of images, or make your own movie from Yohkoh images, why not try our Movie Maker page at URL:
http://www.lmsal.com/YPOP/sxt_movie.html

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